diff --git a/hassio/core.py b/hassio/core.py
index cd3d08f41..db676d91b 100644
--- a/hassio/core.py
+++ b/hassio/core.py
@@ -116,8 +116,7 @@ class HassIO(CoreSysAttributes):
             await self.sys_addons.boot(STARTUP_APPLICATION)
 
             # store new last boot
-            self.sys_config.last_boot = self.sys_hardware.last_boot
-            self.sys_config.save_data()
+            self._update_last_boot()
 
         finally:
             # Add core tasks into scheduler
@@ -134,6 +133,9 @@ class HassIO(CoreSysAttributes):
         # don't process scheduler anymore
         self.sys_scheduler.suspend = True
 
+        # store new last boot / prevent time adjustments
+        self._update_last_boot()
+
         # process async stop tasks
         try:
             with async_timeout.timeout(10):
@@ -162,3 +164,8 @@ class HassIO(CoreSysAttributes):
         await self.sys_addons.shutdown(STARTUP_SERVICES)
         await self.sys_addons.shutdown(STARTUP_SYSTEM)
         await self.sys_addons.shutdown(STARTUP_INITIALIZE)
+
+    def _update_last_boot(self):
+        """Update last boot time."""
+        self.sys_config.last_boot = self.sys_hardware.last_boot
+        self.sys_config.save_data()